While it will inevitably level off eventually, at this rate the referendum will get more than two million votes, and its not inconceivable that it will approach the general election turnout of 2.4 million. And no matter what the result is, that's a success for democracy. It should also put paid to any post-result claims of a "silent majority" secretly supporting the loser: if there is such a majority, they're not going to be a silent one.